Observation of Cochlear Sensory Hairs in the Neonatal Hamster

The authors performed the observation of the cochlear sensory hairs in the neonatal hamster by the scanning electron microscope from the first day to the sixteenth day after birth, by surface preparation technique under the magnifying glass. The results were as follows : The cochlear sensory hairs that were observed as the microvilli in the initial stage grew up to the stereocilia of adult hamster, showing the regular pattern of the development of the cochlear sensory hairs. The time of the completion of those development was judged to be eleven, thirteen and sixteen days after birth, in each basal, middle and apical turn of the basilar membrane

Clinical and Statistical Studies on Laryngeal Carcinoma in Kawasaki Medical School Hospital

The authors reported clinical and statistical studies on the forty-two cases with laryngeal carcinoma that were admitted to Kawasaki Medical School Hospital between June 1975 and September 1981, that is, these cases were reported from viewpoints of age, rate of existence, chief complaints, smoking, drinking, treatments, prognoses, double carcinoma, cause of death, primary parts, total laryngectomy etc

A Case of Lipoma in the Deep Part of Neck

It is comparatively rare that lipoma is found in the deep part of neck, though lipoma is often found in parts of back, neck, breast, etc. And so the authors reported a case of lipoma in 71-year-old woman that was made the diagnosis of lipoma in the deep part of neck, from the clinical symptoms and CT examination, and was confirmed histologically after the enucleation under general anesthesia

Evaluation of the Validity of Methods for Pattern Analysis of Muscle Activity and for Data Reduction

本研究では、同一の被験食品を異なる二体位(座位と仰臥位)で嚥下したときの舌筋筋活動を記録し、その活動パターンのTp法(筆者らが最近開発した解析手法)による解析の妥当性を調べた。また、本解析対象のような生体データのコンピュータによる記録に際し、高頻度のディジタル・サンプリングに伴うデータ・サイズの巨大化がしばしば問題となるところから、リダクション・データに基づく解析の妥当性についても調べた。Tp法による解析の結果、原データを用いた場合に、座位と仰臥位における舌筋活動パターンの差違を識別できた。また、データ・サイズが原データの2^<-6>となる強いリサンプリングを施したリダクション・データを用いても、Tp法のパターン識別能は損なわれなかった。すなわち、本Tp法による筋活動パターンの解析および解析対象のデータ・リダクションの妥当性が示唆された。The present study evaluated the validity of methods for pattern analysis of muscle activity and for data reduction. An electromyogram (EMG) of the tongue muscle was recorded before, during, and after swallowing by surface electrodes either in the upright or in the supine position. The recorded analogue EMG signals were sampled (at 1.0kHz) to convert to digital EMG signals, and the digital EMG signals only during swallowing were extracted mainly based on laryngeal movement. The number of data nodes consisting of the digital EMG signals was reduced to 2^<-i> (i=1, 2, ..., 8) by a re-sampling method. Patterns of the digital EMG signals were analyzed and quantified using a Tp technique developed recently in which assigns percentiles of cumulative EMG signals to a standardized time scale. Two major findings were obtained in the present study. The first finding was that application of the Tp technique detected significant differences in Tp between the upright and supine positions, when the non-reduced (i.e., original) EMG signals were used to calculate. The second finding was that Tp calculated by the original EMG signals were consistent with those by the 2^<-6> reduced EMG signals in the both positions. The present findings suggest the validity of our analytical methods for pattern analysis of muscle activity and for data reduction